Cutter-head.



A. B. LANDIS. CUTTER HEAD. APPLICATION IIL EDMAY 7, 1910.

Patented FGILQO, 1912.

4 SHEETS-SHEET 1.

/ wve'ntor I Gum/M1 A. B. LANDIS.

CUTTER HEAD.

APPLICATION FILED MAY7, 1910.

Patented Feb. 20, 1912.

4 SHEETSSHEBT 2.

.A. B. LANDIS.

CUTTER HEAD.

APPLICATION FILED MAY 7, 1910.

Patented Feb. 20, 1912.

4 SHEETS-SHEET 3.

A. B. LANDIS. CUTTER HEAD. APPLICATION FILED MAY'I,1910.

Patented Feb. 20, 1912.

' 4 SHEETS-SHEET 4.

aria-(M013 ABRAHAM 1B. LANDIS, 0F WAYNESBOZRO, PENNSYLVANIA.

CUTTER-HEAD.

Specification of Letters Patent.

Patented Feb. 20, 1912.

Application filed May 7, 1910. Serial No. 560,089.

provements in the details of construction and arrangement of parts of cutter-heads designed for use on screw-cutting machines, whereby a head is provided for such purposes that is comparatively short, compact and rigid in structure, and one that may be quickly and conveniently adjusted for work of different sizes, and readily opened and closed, all as will be hereinafter more fully described and claimed.

Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts, Figure 1 is a front elevationof a cutter-head of my improved construction, Fig. 2 a rear elevation of the same with the top edge broken out to show one feature of the construction more clearly, Fig. 3 a view chiefly in central longitudinal section on the dotted line 3-8 in Fig. 1, but showing the lowerside of the head in elevation, Fig. 4 a view showing a central section and a rear elevation of the ring A se nrrately,- to better illustrate its particular form, Fig. 5 a similar view of the rear plate A, Fig. (3 a view of the cutter-holder and cutter partly in side elevation and partly in section, Fig. 7 a view' showing the cutter-holder and cutter 1n cross section and the trunnion in side elevation with the parts in operativeposition, Fig. 8 a similar view with the cutter in the position it occupies when being removed, Fig. 9 an underside plan of the cutter-holder and the cutters, and Figs. 10, 11 and 12 detail views of separate parts.

In said drawings the portions marked A- represent the main partof the body, B the cutter-holder trunnions, and C the cutters.

The body A is a casting of appropriate size toaccommodate the various parts of the mechanism and afford seats and bearings therefor and is formed with a central aperture and four bearings for the cutter-holder trunnions distributed equidistant about said central aperture. The rear end of saidbody is formed with a shank A which extends inside of a sleeve A to which it is secured by a key a. set into a seat in said shank A and engaging with a groove in the sleeve A Said sleeve A is secured to. the spindle, or

turret of the machine. A spring a is mounted in 'a longitudinal socket in the sleeve A. bearing between the inner end of said socket at one end and at its other end against a keeper a secured by a screw a to the rear end of the shank A. and adapted to slide for a limited dlstance in a notch or recess in the adjacent part of said sleeve A Said spring thus normally holds the parts closed, or with the outer end of sleeve A abutting the rear face of the head. A locking-pin a is mounted in the end of sleeve A plate is connected with the body Aby means of aspring 2 one end, 3, of which projectshorizontally into a perforation in plate A and the other end, 4, of which projects vertically into a perforation in the body A.

Said spring is mounted in a recess within the rim of plate A and preferably consists of a plurality of coils the tension of which is exerted to rotate plate At around body A for a limited distance when said body is slid outward in sleeve A? to disengage the locking-pin a as will be presently-described. Another plate A is also mounted on body A having an inwardly projecting, hub 5 on the periphery of which are formed gearteeth and with a rearwardly projecting.

flange 6 at its outer edge which surrounds the periphery of plate A A screw 7 is mounted in a tangential socket in the outer edge of said plate A the threadsof which are adapted to engage'with screw-threads in the periphery of said plate A and by the turning of which said plate A may adjusted I circumferentially' around said plate A The cutter-holder trunnions B are formed with parts B extending to one side of the axis thereof in which are formed the seats for I the cutters. Said trunnions B are formed as best shown in'Figs. 3 and 9wvith their inner outer corners cut away to ac- .commodate the cutters of the cutter-holder parts of the adjacent holders and with their unnodate inc lit. 5 of l of said trt unions form mounted therein cylinder of which is ted to engage on tr surface of t 14 outer er oi? said. cylinders toii'iued with an eccentteic or oral a 11 which projects thi n h a pertor rtio the outer project The at stood by an 111g wing 7 1L) inoclts 12,

' c on the outer 20115311 which the 10 in the tra L781 -hohflers elittl'i'u; W one end in a pa?" other end.

usiou lieoutward rich as to st sliding; cutter-holde i the die, the cutters awn ring A is head A with its 1 t, V

tl 2 ends of tliie trunnion? ll, thus securing: said ti'unuiorcs hotween said ring It on the outer end ofi the head and the plate t." tn its rear end against lont'ti'uliual EllUVtll'l" t.

Fluid ring also of sul'iu ti all t width to p:

the or: i

.COYGF the outer en t? 5 0 pint, 1,1 of caninders 1t) and also 5; blocks 12 and thu prevent lli'fv' outward movement of the cylinder and hold him h 1:2 in place.

The cutters C are ot suhstantiall i i sliiown in other a'p'plieatioinheretoiore ay me. (for example tiled ruary 1, 1910) exoept ti (t .1 corners are toi'nied with TocesSCS overhanging, or dove-tail shaped outer corners engaging under a correspond ingly shaped flange b and the inner ed '0 heing; engaged by a corespondin li' shaped corner of a locking lever-plate 17 mounted in a socket 16 which cuts into the ssat for said cutter-holders. Said lwrlcin gg leverplate is preferably mounted t Tool: in said socket by means of uojecting lmai'iugz points on its o' iposite sides which tes against the walls of said St'hlflii' it screw 17 is mounted in a solicit-threw och-2t 1 part B and its not end an; 6 with SOCliQt in said. locking plate 15 outside its lmirings. Thus when so" into its seat, as shown in i plate will he turned on'it its tapered point; will tapered flange on the the cuttcr and cla while when said screw is backed 3 seat, shown in 8, the weightcutter will turn said. locking plate J i". settings and permit the cutter to fall out, c Said cutter is held in posiion and aiilgusted longitudinally lay i'neans of a screw 18 having screwthreadcd collars 19 engaging with transverse grooves 20 in said cutter and with screw threads in the whet in part which cuts into the cutter holder seat.- Said screw 18 is also formed on its rear end with knurled collars 21 by which it may l: e turned to adjust said cutter longitudinally.

The opcation of my said invention is as it. )llon's: The parts being; assembled, as 1; town in 1, 2 and and the head mounted upon the machine spindle by means of suitahle adjustment between the sleeve A and said spindle. the operation of cutting 'roceeds until the lii-iitis reached, when a hill'lll rotation of the head, operates to slide said head. outward in sleeve A? until the plate A." is discnga from the rockingpin a when the spring "will expand and turn said plate A with the plate -13 which is (mum-led therewith by means Oil the screw 7 tor a limited diritance. Said movement opthrough the gear-teeth on the huh I ate i to rotate the cylinders 10, t which. through their cranlopins 11 operate l the clitter-hohlers outwardly and o e die, as has been before desta'ihed. 'the si' dint; of the head outwardly operates to spring u and when it is desired tit close the die for the next operation, the operator through a handle H on the periphery of plate A turns said back plate to its originz'ii position until the outlet lockingqvin a registers with the pertoratiol'i a, when the spring (4' will expand and bring the parts together into locked position.

The die in:

q he adj usted for different sizes of work 11 turn ng the screw- 7 to adjust the plate A? eircuintercinially in relation to the plate A which igr ierates through the gear connection between said plate and tho tiilin ler.i 10 to turn said cylinders, and

through their crank-pins adjust the size of the the. 1 have shown av SifilQ s on the periphery o the body A. and a 1 indicator it marl; on the adjacent surface of the ring It hi; which the :uljustinent of the die may wiuinod accurately too-try point dewill be readily seen. thus tally descrih o.

111 said inand desire to i N motion, what 1: cl ain't as new swore by Letters Patent, 15:

1. A cutter -hcad. comprising a body ll'ii'ntlllfetl in sleeve to have limited longit linal movement therein cutter-holders unaui'ited with their truniii'ions in hearing in sa d body, cylinders mounted in perforations it said trunnions and termed with crankpins: on their front ends with bearmimosa ings on the sides of the adjacent cutterholders and with their rear ends formed with gear-teeth on their peripheries, a plate mounted on the rear end of said body and formed with a hub vhaving gear-teeth engaging with the gear-teeth on said cylinders, means for normally locking said plate to the sleeve, means for rocking said plate automatically when said locking means is disengaged, whereby said cylinders are rocked to open the die, and means for restoring the.

parts to locked position, substantially as set forth. I

2. A cutter-head comprising a body mounted in a supporting sleeve to have a limited longitudinal movement therein, cutter-holders the trunnions of which are mounted'in bearings around the axis of said body, the cutter-holders being formed to one side-of the axis of each of said trunnions, cylinders mounted in perforations in said trunnions and formed with crank-pins on their-outer ends and' gears on their rear ends, said'.'crank-pins engaging with bearings in the adjacent cutter-holders and said gears engaging with a single rocking gear,'means for securingsaid rocking gear in a fixed position-to holdthe die closed, means rocking said gear a'limited distance to open the die, and means for returning the parts to locked position, substantially as set forth.

A cutter-head comprising a body formed with bearings around its axis for the trunnions of the cutter-holders, said outter-holders mounted on one side of the axis of a hollow trunnion, said trunnions being mounted in the bearings provided therefor in said. body,'rocking cylinders mounted in said hollow trunnions having crank-p ins on their front 'en'ds engaging with the adjacent cutter-holders and gear-teeth on their rear ends, a rocking gear mounted on the rear end of said body engaging with the gears of said several cylinders, a plate connected 'withsaid rocking gear by means to permit a circumferential adjustment between them, a locking device adapted to secure said plate to rotate with a head, means for rotating said plate a limited distance independent of the body when said locking means is disengaged, and means for restoring the parts to locked position, substantially as set forth.

4. A cutter -head comprising a body formed with journals for the cutter-holder trunnions around its axis, cutter-holders formed with hollow trunnions, said trunnions mounted in the hearings in said body,

rocking cylinders with crank-pins on their front ends mounted in said trunnions with the crank-pins engaging. with the adjacent cutter-holders, means for rocking said cylinders to open andclose the die. and means for securing said cylinders to hold the die in fixed adjustment, substantially as set forth.

. substantially as set forth.

I 5. A cutter head comprising .a body, cutter-holders journaled on said body around its axis, rocking parts mounted in perforations 1I1 the trunnions .of said cut-.

'ter-holders and carrying crank-pins on their frontends, said crank-pins being each engaged with an-adjacent cutter-holder, and means for rocking and securing said rocking parts, substantially as set forth.

6. A cutter-head comprising av body mounted in a sleeve, said sleeve, a key for securing said sleeve and body from independent rotation mounted in a seat in one and engaged With a groove in the other, a

spring mounted in a socket in said sleeve I the outer end ofwhich bears against a keeper secured to a part of the body and adapted to slide in a groove formed in said sleeve at the outer end; of said socket, a locking-pin mounted in said sleeve and adapted to engage with a plate carriedv on said body, said plate, a spring interposed between said plate and said body for normally rocking said plate thereon, the cutterholders mounted on one side of hollow trunnions, said trunnions mounted in bearings in said body,,cylinders inountedin said hollow trunnions formed with crank-pins on I theirv front feuds engaging with the adjacent cutterholders,'the rear endsof said trunnions being geared to said roc'kin'gplate, substantially asset forth.

7 A cutter-head comprising. cutter-holders formed with seats for the cutters, cutters mounted in said seats, and means for clamping said cutters in said seats comprising a pivoted lever fulcrumed in a slot adjacent to the inner edge of said cutters-and a screw mounted in a seat in said cutterholder and adapted to operate said lever,

8. A cutter-holder for cutter-heads comprising a seat for the cutter therein, said cutters mounted in said seat its back being formed with a longitudinal cut-under groove at each edge, a fixed flange on the outer edge of the seat for engaging said outeredge and a pivoted lever plate fulcrumed in a slot alongside the inner edge of said cutter the lower edge of said plate being formed with a tapered corner to engage the inner corner of said cutter and a screw mounted in a seatin said cutter-holder the inner end of which is adapted to engagvthe outer end of said lever whereby it may be operated to clamp or release said cutter, substantially as set forth.

9. j A cutter-head comprising'a body formed the bearings in said body, sliding blocks mounted on the outer edge of the ends of said cutter-holders inside their bearings,

springs for holding said cutter-holders lllllflfid on their trunnions outwardly into engagement with said-blocks, rocking cylin LiEIS Wibh crank-pins 0n their front ends mounled in said trunnions with the crankpins engaging the sliding blocks of t 2 djacent cutter-holders, means for rocking said cylinders to open and close 'the die, and means for securing said cylinders to held the die in fixed adjustment, substantially as setforth 10. A cutter-head cempri a body eutter-holders mounted to rock on said body, sliding blocks arranged to bear on the outer edges of said cutter-holders, springs for holding said cutter-holders against saidsiid' ing blocks, rocking parts with eccentric beurlugs engaging with eaid sliding blocks, means 101' rocking said parts, and. means for securing said perfs in fixed adjustment substantiall as set forth.

11. A cutter-head comprising a body, cut fer-holders mounted is rock thereon tech-- ing eccentric parts engaging With said out ter-helders to one side of their pivots for holding and adjusting (b3111 and means for securing said rocking parts, substantially as setforth.

In Witness whereof I, have hereunto set my hand and seal at Washington, District of Columbia, this 80th. day of April, A. D. nineteen hundred and ten.

ABRAl-IAM B. LANDIS. [11. e]

Witnesses: I

E, N. BRADFORD, IiARRY L. LANDIS. 

